Whilst www.irishgenealogy.ie is good for Dublin Kerry and Cork it does not contain records for the rest of the country. You have 3 options
1. Pay a subsciption to www.rootsireland.ie which has records for most of the country.
2 search the microfilms online at registers.nli.ie this is free but hard to read.
3. use www.findmypast.ie then go A to Z records, search for roman catholic records in the search box, these are free and do not need a subscription.
I wish you luck in finding answers to your questions.
Daithí Mac an Aircinn